| 1 |
Which is a secondary pollutant |
- A. Carbonic acid
- B. CO<sub>2</sub>
- C. SO<sub>2</sub>
- D. CO
|
| 2 |
In which layer of atmosphere, ozone is present. |
- A. Thermosphere
- B. Mesosphere
- C. Stratosphere
- D. Troposphere
|
| 3 |
The pH range of the acid rain is |
- A. 7-6-5
- B. 6.6-6
- C. 6-5.6
- D. less than 5
|
| 4 |
In water the concentration of dissolved O<sub>2</sub>should be |
- A. 1-3 ppm
- B. 2-4 ppm
- C. 4-8 ppm
- D. 8-12 ppm
|
| 5 |
Ecosystem is a smaller unit of |
- A. lithospher
- B. hydroshper
- C. atmosphere
- D. biosphere
|
| 6 |
The thickness of ozone layer is. |
- A. 25 to 50 km
- B. 25 to 28 km
- C. 3 km only
- D. 1 km only
|
| 7 |
Which one of the followings is not a pollutant. |
- A. CO2
- B. NO2
- C. CO
- D. SO2
|
| 8 |
Which one is primary pollutant. |
- A. Peroxyacetyl nitrate
- B. Sulphuric acid
- C. Carbonic acid
- D. Carbon monoxide
|
| 9 |
On earth polar ice caps and glacier contains H2O |
|
| 10 |
The pH range of the acid rain is. |
- A. 7-6.5
- B. 6.5-6
- C. 6-6.5
- D. Less than 5
|